Summers, MD, MPH, P., B. Alemu, MA, MPH, CPH, and A. Quidgley-Nevares, MD. “History of Drug Use Predicts Opioid Treatment Agreement Violation”. Journal of Opioid Management, vol. 11, no. 6, Nov. 2015, pp. 501-6, doi:10.5055/jom.2015.0303.